Hello ,
I’m here to help you in resolving your issue
1: Open Control Panel > Hardware and Sound > Power Options.
2: Click on Change plan settings for your selected power plan.
3: Click on Change advanced power settings.
4: Expand USB settings > USB selective suspend setting and set it to Disabled.
5: Expand PCI Express > Link State Power Management and set it to Off.
6: Expand Sleep and make sure Allow wake timers is Enabled.
7: Expand Allow hybrid sleep and set it to Off (some BIOS settings override hybrid sleep).
Also, Check if Fast Startup is Interfering
1: Go to Control Panel > Power Options > Choose what the power buttons do.
2: Click Change settings that are currently unavailable.
3: Scroll down to Turn on fast startup and uncheck it.
4: Restart your PC and check if LEDs stay on in sleep mode.
After trying above steps, please reach out to me if you have any doubts or issues
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